English 
four-part
German 
Portuguese 
translation - four-part translate | English dictionary
- four-lane highway
- four-layer
- four-leaf clover
- four-legged
- four-letter words
four-part
- four-party line with selective ringing
- four-phase modulator
- four-phase operation
- four-phase technique
- four-place
- four-plus-one address
- four-point probe method
- four-pole
- four-pole analysis
- four-pole connection
- four-pole determinant
- four-pole dissection
- four-pole equation
- four-pole matrix
- four-pole network
- four-pole parameter
- four-pole transformation
- four-pole wave
- four-port
- four-port circulator
- four-port network
- four-poster
- four-poster bed
- four-quad series array
- four-quadrant drive
